Abstract:In water projects, dam roads and some flood control roads generally have problems of low bearing capacity and uneven settlement. Valve pipe grouting technology is widely used in foundation treatment due to its advantages such as controllable grouting range and simple construction. To study the diffusion rule of grout in different types of soil in the valve pipe grouting process, this paper designs indoor model tests of valve pipe grouting in sand and silt, and analyzes the influence of changes in grouting parameters on the reinforcement radius. The research results provide data reference for the application of valve pipe grouting technology in water projects.